Antiperspirant compositions and methods for preparing antiperspirant compositions

ABSTRACT

Antiperspirant compositions are provided. In an exemplary embodiment, an antiperspirant composition includes an active antiperspirant compound and a structurant compound. The structurant compound includes a polyethylene having an average molecular weight of about 450 Daltons to about 580 Daltons and a polydispersity of greater than or equal to about 1.03. The polyethylene has a melting temperature of less than about 78° C.

TECHNICAL FIELD

The present disclosure generally relates to antiperspirant compositionsand methods for preparing antiperspirant compositions, and moreparticularly relates to antiperspirant compositions including apolyethylene structurant and methods for preparing the same.

BACKGROUND

Antiperspirants are popular personal care products used to prevent oreliminate perspiration and body odor caused by perspiration.Antiperspirant products, including for example sticks, emulsions,aerosol sprays, and roll-on antiperspirants are desired by a largemajority of the population because of the presence of activeantiperspirant compounds that minimize or prevent the secretion ofperspiration by blocking or plugging ducts of sweat-secreting glands,such as those located at the underarms. Antiperspirants typicallyinclude an active antiperspirant compound in a carrier that permits theantiperspirant product to be applied to the skin by swiping or rubbingthe stick across the skin, typically of the underarm. Upon applicationof the antiperspirant product, the carrier coats the skin or evaporates,releasing the active antiperspirant compound from the antiperspirantproduct upon exposure to moisture to form plugs in the sweat ducts.

Active antiperspirant compounds reduce underarm wetness and odor bymigrating into openings of the sweat gland ducts and reacting withproteins therein to form antiperspirant plugs, which mechanicallyprevent sweat from escaping the ducts. Two types of sweat glands arepresent in the underarm region. The first type of sweat gland, theapocrine sweat gland, terminates and secretes at the top of hairfollicles. As such, active antiperspirant compounds should migrate intothe hair follicle to access the apocrine sweat gland duct and blocksecretion. The second type of sweat gland, the eccrine sweat gland,opens directly onto the skin. Eccrine sweat is responsible for thelargest volume of sweat that causes underarm wetness. As with apocrinesweat glands, active antiperspirant compounds migrate into the eccrinesweat gland openings and form plugs, which reduce underarm wetness.

Some antiperspirant compositions known in the art of the stick typeinclude one or more structurant compounds, which are included to providegood “glide” qualities (i.e., ease of application when the stick ismoved across the underarm region) and to minimize residue deposits onthe skin. Exemplary structurant compounds currently known in the artinclude intermediate molecular weight polyethylenes, such aspolyethylenes having an average molecular weight between about 360Daltons and 460 Daltons.

The manufacture of such polyethylene structurants, however, requires theuse processing conditions that are undesirable. For example, where theabove-noted intermediate molecular weight polyethylenes are employed inan antiperspirant composition, it is necessary to melt the polyethylenesbefore they can be combined with the active antiperspirant compound.Such melting requires the use of undesirably high processingtemperatures in the manufacturing process, such as at least about 85°C., which corresponds with the approximate melting point of theseintermediate molecular weight polyethylene compounds.

As is well known in the art, high processing temperatures not onlyconsume high operation energy, but it also increases the risk ofcorrosion on the manufacturing equipment. For example, certain activeantiperspirant compositions increase in acidity with increasingtemperature, thereby causing an increased risk of corrosion to themanufacturing equipment. Furthermore, the use of such high operatingtemperature increases both the complexity and cost of manufacturing theantiperspirant composition by requiring additional heating elements toachieve the higher temperature and additional safety precautions for thepersonnel operating the equipment.

Accordingly, it is desirable to provide antiperspirant compositions thatexhibit the same or similar glide and residue deposition qualities asantiperspirant compositions that intermediate molecular weightpolyethylenes, but that do not require excessively high processingtemperatures for their manufacture. Further, it is desirable to providemethods for preparing these antiperspirant compositions. Still further,other desirable features and characteristics of the present disclosurewill become apparent from the subsequent detailed description theappended claims, taken in conjunction with the accompanying drawings andbackground.

BRIEF SUMMARY

Antiperspirant compositions and methods for preparing the same areprovided. In an exemplary embodiment, an antiperspirant compositionincludes an active antiperspirant compound and a structurant compound.The structurant compound includes a polyethylene having an averagemolecular weight of about 450 Daltons to about 580 Daltons and apolydispersity of greater than or equal to about 1.03. The polyethylenehas a melting temperature of less than about 78° C.

In another exemplary embodiment, a method for preparing anantiperspirant composition includes combining an active antiperspirantcompound, an alcohol, and water at a first temperature to form a firstmixture and combining a structurant compound and a silicone oil at asecond temperature to form a second mixture. The structurant compoundincludes a polyethylene having an average molecular weight of about 450Daltons to about 580 Daltons and a polydispersity of greater than orequal to about 1.03. The polyethylene has a melting temperature of lessthan about 78° C. The second temperature is less than about 78° C. Themethod further includes mixing the first and second mixtures, and thenhomogenizing the first mixture and the second mixture to form a combinedphase antiperspirant composition. Still further, the method includespouring the antiperspirant composition into a mold and cooling the moldto a third temperature that is lower than both the first and secondtemperatures.

This summary is provided to introduce a selection of concepts in asimplified form that are further described below in the detaileddescription. This summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

DETAILED DESCRIPTION

The following detailed description is merely exemplary in nature and isnot intended to limit the disclosed embodiments or the application anduses of the disclosed embodiments. Furthermore, there is no intention tobe bound by any theory presented in the preceding background or thefollowing detailed description.

The various embodiments contemplated herein relate to antiperspirantcompositions and methods for preparing antiperspirant compositions. Thevarious embodiments of the compositions exhibit desirable glide andresidue deposit characteristics, while avoiding the need for processingat excessively high temperatures, such as 85° C. or above. The variousembodiments of the methods described herein provide processing steps forthe preparation of such compositions.

Water Phase

Antiperspirant compositions in accordance with the present disclosureinclude a water phase. The water phase includes water and one or morewater-soluble compounds. In an exemplary embodiment, the water phaseincludes water, an active antiperspirant compound, and a skin emollientto improve the skin “feel” of the antiperspirant composition as it isapplied to the skin.

In one embodiment, an antiperspirant composition in accordance with thepresent disclosure includes a water-soluble active antiperspirantcompound in the water phase. Active antiperspirant compounds contain atleast one active ingredient, for example metal salts, that, as notedabove, are thought to reduce perspiration by diffusing through the sweatducts of apocrine glands and eccrine glands and hydrolyzing in the sweatducts, where they combine with proteins to form an amorphous metalhydroxide agglomerate, plugging the sweat ducts so perspiration cannotdiffuse to the skin surface.

Some active antiperspirant compounds that may be used in theantiperspirant product include astringent metallic salts, for exampleinorganic and organic salts of aluminum, zirconium, and zinc, includingtetra- and octa-salts, as well as mixtures thereof. Exemplary compoundsinclude aluminum-containing and/or zirconium-containing salts ormaterials, such as aluminum halides, aluminum chlorohydrates, aluminumhydroxyhalides, zirconyl oxyhalides, zirconyl hydroxyhalides, andmixtures thereof. Exemplary aluminum salts include those having thegeneral formula Al₂(OH)_(a)Cl_(b)x(H₂O), wherein a is from 2 to about 5;a and b total to about 6; x is from 1 to about 6; and wherein a, b, andx may have non-integer values. Exemplary zirconium salts include thosehaving the general formula ZrO(OH)_(2-a)Cl_(a)x(H₂O), wherein a is fromabout 1.5 to about 1.87, x is from about 1 to about 7, and wherein a andx may both have non-integer values. Exemplary zirconium salts are thosecomplexes that additionally contain aluminum and glycine, commonly knownas ZAG complexes. These ZAG complexes contain aluminum chlorohydroxideand zirconyl hydroxy chloride conforming to the above-describedformulas. Examples of active antiperspirant compounds suitable for usein the various embodiments contemplated herein include aluminumdichlorohydrate, aluminum-zirconium octachlorohydrate, aluminumsesquichlorohydrate, aluminum chlorohydrex propylene glycol complex,aluminum dichlorohydrex propylene glycol complex, aluminumsesquichlorohydrex propylene glycol complex, aluminum chlorohydrexpolyethylene glycol complex, aluminum dichlorohydrex polyethylene glycolcomplex, aluminum sesquichlorohydrex polyethylene glycol complex,aluminum-zirconium trichlorohydrate, aluminum zirconiumtetrachlorohydrate, aluminum zirconium pentachlorohydrate, aluminumzirconium octachlorohydrate, aluminum zirconium trichlorohydrex glycinecomplex, aluminum zirconium tetrachlorohydrex glycine complex, aluminumzirconium pentachlorohydrex glycine complex, aluminum zirconiumoctachlorohydrex glycine complex, zirconium chlorohydrate, aluminumchloride, aluminum sulfate buffered, and the like, and mixtures thereof.In one embodiment, the active antiperspirant compound is aluminumzirconium pentachlorohydrex glycine complex or aluminum zirconiumtrichlorohydrex glycine complex.

In an embodiment, the antiperspirant composition includes an activeantiperspirant compound in an amount of about 10 wt. % to about 30 wt. %of the overall antiperspirant composition, for example about 10 wt. % toabout 20 wt. %, such as about 15 wt. % to about 20 wt. %. As usedherein, the weight percent or wt. % of the active antiperspirantcompound is calculated as an anhydrous weight percent but with boundglycine included in the calculation, as is well known in the art. Assuch, this calculation excludes any bound water but includes any boundglycine. In an exemplary embodiment, the antiperspirant compositionincludes about 15 wt. % to about 25 wt. % aluminum zirconiumoctachlorohydrex glycine complex, for example about 18% aluminumzirconium octachlorohydrex glycine complex.

In addition to the antiperspirant salt, the antiperspirant compositioncan include a water-soluble aliphatic alcohol, which may be monohydricor polyhydric. The weight proportion of aliphatic alcohol is typicallyprovided in a weight percentage of less than about 25% of the overallantiperspirant composition, for example less than about 15 wt. %. In oneembodiment, the weight percentage of the water-soluble aliphatic alcoholis less than about 10%, for example about 8%. Used as a humectant toenhance skin feel, in some embodiments, the alcohol can be, for example,propylene glycol. An exemplary antiperspirant composition includes lessthan about 15 wt. % propylene glycol, for example about 8 wt. %propylene glycol.

As noted above, the water phase also includes water. Water is providedto solubilize the water phase components of the antiperspirantcomposition, such as the active antiperspirant compound and the alcoholdescribed above, in addition to any other water soluble components thatmay be present in the water phase. In one embodiment, water is providedin a weight percentage of the overall antiperspirant composition fromabout 20% to about 60%, such as from about 30% to about 50%, for exampleabout 39% or about 40%.

To prepare the water phase, the components thereof, for example thewater, the active antiperspirant compound, and the alcohol are combinedand heated. For example, the components can be combined and heated to atemperature of about 65° C., 70° C., or 75° C., or any temperaturethereinbetween. Further, the components of the water phase can bemechanically agitated to promote solubilization, such as by moderatestirring. As such, the water phase, when combined, includes about 60 wt.% to about 75 wt. % of the overall antiperspirant composition, such asabout 65 wt. % to about 70 wt. %, for example about 68 wt. %.

Oil Phase

Antiperspirant compositions according to the present disclosure areformulated as a water-in-oil emulsion. As such, in addition to the waterphase described above, the antiperspirant compositions also include anoil phase. In an exemplary embodiment, the oil phase includes one ormore structurants, one or more carrier solvents, and one or moreemulsifiers/surfactants.

As such, in one embodiment, an antiperspirant composition in accordancewith the present disclosure includes at least one polyethylenestructurant in the oil phase, which as noted above facilitates the solidconsistency of the antiperspirant stick product, in additional toproviding desirable glide qualities and minimized residue deposited onthe skin. As is known in the art, polyethylene structurant compounds canbe provided as mixtures having polyethylenes within a wide range ofmolecular weights. As such, polyethylene structurants are typicallydescribed with reference to an average molecular weight, i.e., a massaverage of all of the constituent polyethylene molecules in thestructurant. As will be discussed in greater detail below, in anexemplary embodiment, the polyethylene is selected as having an averagemolecular weight from about 360 Daltons to about 600 Daltons, forexample from about 450 Daltons to about 580 Daltons, such as about 485Daltons, or a mixture of such polyethylenes.

As is further known in the art, polyethylene structurant may also bedescribed with reference to a polydispersity index. The polydispersityindex (PDI) or heterogeneity index, is a measure of the distribution ofmolecular mass in a given polymer sample. The PDI calculated is theweight average molecular weight M_(w) divided by the number averagemolecular weight M_(n). The PDI indicates the distribution of individualmolecular masses in a batch of polymers. The PDI has a value equal to orgreater than 1, but as the polymer chains approach uniform chain length,the PDI approaches unity. As will be discussed in greater detail below,the polyethylene is selected having a PDI equal to or greater than about1.03, such as greater than or equal to about 1.05.

In one embodiment, the polyethylene compound is provided in a weightpercentage of about 5 wt. % to about 15 wt. % of the overallantiperspirant composition, for example about 8 wt. %, about 13 wt. %,or about 12 wt. %. Desirably, the polyethylene compound is present in aproportion high enough to solidify the emulsion and provide a hardnesssufficient for preparation as a stick antiperspirant.

As noted above, the polyethylene structurant is provided with an averagemolecular weight from about 450 Daltons to about 580 Daltons, and with aPDI of greater than or equal to about 1.03, such as greater than orequal to about 1.05. The inventors have surprisingly discovered thatthis combination of structurant qualities, when combined into anantiperspirant formulation as described herein, provide desirablehardness for preparation as a stick antiperspirant while allowing formanufacturing and processing temperatures well below those currentlyknown in the art, for example about 5° C. to about 10° C. lower thanthose currently known in the art. For example, in accordance with thepresent disclosure, and as described in greater detail below, theantiperspirant compositions can be processed and manufactured at maximumtemperatures between about 75° C. and about 78° C.

For example, in one embodiment, the polyethylene compound known asJeenate 3H™, available from Jeen International Corp. of Fairfield, N J,is used as the structurant for the antiperspirant composition. Jeenate3H™ desirably has an average molecular weight of about 485 Daltons, aPDI of about 1.052, and a melting point of about 73° C. (melting beginsat about 70° C., and melting is complete at about 75° C.). In anexemplary embodiment, Jeenate 3H™ is provided as a polyethylenestructurant in the oil phase at a weight percentage of about 10% toabout 12%, for example about 11%.

In addition to the above-noted structurant, some embodiments of theantiperspirant compositions described herein further include arelatively small amount (e.g., less than 1% by weight of the overallcomposition) of a supplemental structurant to improve the hardness ofthe stick antiperspirant. For example, a suitable supplementalstructurant is the synthetic wax sold under the trade name Performa V343™, available from Baker Hughes Incorporated of Sugar Land, Tex. Inone embodiment, such supplemental structurant is provided in a weightpercentage of about 0.01% to about 0.5 percent, such as about 0.1%.

In one embodiment, the antiperspirant composition further includes acarrier solvent, such as a hydrophobic carrier solvent, in the oilphase. Exemplary hydrophobic carriers include liquid siloxanes andparticularly volatile polyorganosiloxanes, that is, liquid materialshaving a measurable vapor pressure at ambient conditions. Thepolyorganosiloxanes can be linear or cyclic or mixtures thereof. Thelinear volatile silicones generally have viscosities of less than about5 centistokes at 25° C., while the cyclic volatile silicones haveviscosities under 10 centistokes. Exemplary siloxanes includecyclomethicones, which have from about 3 to about 6 silicon atoms, suchas cyclotetramethicone, cyclopentamethicone, and cyclohexamethicone,cyclohexasiloxane, and mixtures thereof. The carrier also may include,additionally or alternatively, nonvolatile silicones such as dimethiconeand dimethicone copolyols, which have from about 2 to about 9 siliconatoms. Examples of suitable dimethicone and dimethicone copolyolsinclude polyalkyl siloxanes, polyalkylaryl siloxanes, and polyethersiloxane copolymers.

The carrier solvent of the oil phase is provided from about 5 wt. % toabout 10 wt. % of the overall composition. For example, the carriersolvent can be provided from about 7 wt. % to about 8 wt. %. In anexemplary embodiment, the carrier solvent is cyclohexasiloxane provideat about 7 wt. % or about 8 wt. %. A suitable cyclohexasiloxane isavailable form Dow Corning Corporation of Midland, Mich. under the tradename PMX-246®.

In addition to the above-noted carrier solvents, an additionalhigh-refractive index carrier solvent may be provided that desirablyreduces the appearance of the antiperspirant composition when applied tothe skin. Suitable high-refractive index carrier sovlents include PPG-14and aromatic esters, for example. Many of the aromatic esters arebenzoate esters, others are naphthylate esters and still others aresalicylate esters. Amongst the class of benzoate esters, it is desirableto mention alkyl benzoate, alkylene dibenzoate, alkoxylated alkylbenzoate or a polyalkylene oxide dibenzoate, or a mixture of two or moresub-classes thereof. The alkyl group often contains at least 10 carbons,in many instances up to 25 carbons. It is often linear, but canalternatively be branched. Especially desirable alkyl groups are foundin the range of from 12 to 20 carbons and include dodecyl (lauryl)terdecyl, tetradecyl (myristyl), pentadecy, hexadecyl (palmityl),octadecyl (stearyl) 2-methyl-heptadecyl (iso-stearyl) and octyldodecylgroups. A mixture of two or more of the alkyl groups can be employed,such as a mixture of C₁₂-C₁₅ alkyl groups. The term alkylated hereinincludes alkylene groups and the latter are terminated at each end witha benzoate group. The alkylene group often contains from 2 to 6 carbonsand can be linear or branched, a suitable example of linear beingpropylene. In the alkoxylated alkyl benzoates contemplated herein, thealkyl group is terminated by an alkoxy group, which can be monomericcontaining for example up to 6 carbons or polymeric such as polyethyleneoxide or preferably polypropylene oxide, which includes up to 30 unitsand often from 5 to 20 units. In such compounds, the alkyl group can beselected from the previously identified alkyl groups. Alternatively, thebenzoate compound can include a polyethylene oxide or polypropyleneoxide moiety, or a block copolymer of ethylene oxide and propyleneoxide, terminated at each end by a benzoate group. Mixtures of two ormore of the benzoate sub-classes of compounds can be employed.

The above-noted high-refractive index solvents are provided in theantiperspirant composition in a weight percentage from about 5% to about15%, for example about 10%. In one embodiment, the high-refractive indexsolvent is provided as a C₁₂-C₁₅ alkyl benzoate in an amount of about 10wt. % of the overall composition. Several such benzoate compounds, suchas Finsolv TN™, are available from Innospec Incorporated of Lone Tree,Colo.

In one embodiment, the antiperspirant compositions further include atleast one water-in-oil emulsifier/surfactant in the oil phase, such as asilicone-based water-in-oil emulsifier. One group of silicone-basedwater-in-oil emulsifiers which is suitable for use in the presentlydescribed compositions are poly-(C₂-C₃)alkylene glycol-modifiedsilicones, the former INCI name of which was dimethicone copolyol, withthe current INCI name PEG-x dimethicone (with x=2-20, for example 3-17,such as 11-12), bis-PEG-y dimethicone (with y=3-25, preferably 4-20),PEG/PPG-a/b dimethicone (wherein a and b mutually independently denotenumbers from 2-30, for example 3-30, such as 14-18), bis-PEG/PPG-c/ddimethicone (wherein c and d mutually independently denote numbers from10-25, for example 14-20, such as 14-16), and bis-PEG/PPG-e/fPEG/PPG-g/h dimethicone (wherein e, f, g and h mutually independentlydenote numbers from 10-20, for example 14-18, such as particularlypreferably 16). Further silicone-based W/O emulsifiers may be employedin accordance with the present disclosure are poly-(C₂-C₃)-alkyleneglycol-modified silicones, which are hydrophobically modified withC₄-C₁₈ alkyl groups, for example cetyl PEG/PPG-10/1 dimethicone, alkylmethicone copolyols, and alkyl dimethicone ethoxy glucoside.

The W/O emulsifiers are typically provided in a weight percentage ofless than about 5 wt. % of the overall composition, for example lessthan about 3%, such as less than about 2%. In an exemplary embodiment,the W/O emulsifier is cetyl PEG/PPG-10/1 dimethicone provided in aweight percentage of less than about 2%, for example about 1.5%. Asuitable cetyl PEG/PPG-10/1 dimethicone is available from EvonikIndustries AG of Essen, Germany under the trade name Abil EM 90™.

In some embodiments, the antiperspirant composition may further includea supplemental emulsifier or co-surfactant. The supplemental emulsifieror co-surfactant is provided to enhance the stability of the emulsionand to reduce the stickiness of the product after application, so as toavoid phase separation prior to application on to the skin. In oneexample, a suitable co-surfactant is provided as bis-PEG/PPG-14/14dimethicone in an overall weight percentage of the antiperspirantcomposition of about 0.05% to about 2%. A suitable bis-PEG/PPG-14/14dimethicone is available from Evonik Industries AG of Essen, Germanyunder the trade name Abil EM 97 S™.

In addition to the compounds identified above, the antiperspirantproduct may optionally include additives, such as those used inconventional antiperspirants. These additives include, but are notlimited to, fragrances, including encapsulated fragrances, dyes,pigments, preservatives, antioxidants, moisturizers, and the like. Theseingredients can be included in the antiperspirant composition in anamount of about 0 wt. % to about 20 wt. %. In an exemplary embodiment, afragrance is provided in the antiperspirant composition in a weightpercentage of less than about 2%, and is added to the combined phasebefore homogenization.

To prepare the oil phase, the components thereof, for example thecarrier solvents, the structurants, and the emulsifiers/surfactants, arecombined and heated to form a single phase mixture. For example, thecomponents can be combined and heated to a maximum temperature of about75° C. to about 78° C. As noted above, due to the careful selection ofstructurants and other compounds of the oil phase, heating thereof isdesirably performed at a temperature that is significantly lower thanhad previously been known in the art for antiperspirant compoundsincluding intermediate molecular weight polyethylene structurants.Further, the components of the oil phase can be mechanically agitated topromote integration, such as by moderate stirring. As such, the oilphase, when combined, includes about 25 wt. % to about 40 wt. % of theoverall antiperspirant composition, such as about 30 wt. % to about 38wt. %.

Emulsion

The antiperspirant composition, in an exemplary embodiment, is preparedby combining the water phase, which includes the antiperspirantcompound, the alcohol, and water with the oil phase, which includes thestructurant, the emulsifying compounds, and the hydrophobic carriersolvent compounds. Any suitable form of mixing can be used to combine(homogenize) the ingredients, such as high shear mixing, stirring,agitation, blending, or any combination thereof. Typically, the waterphase is slowly added to the oil phase at a temperature of about 65° C.to about 75° C. while continuously stirring with a blade at, forexample, about 500 rpm, for a time period of, for example, about 5minutes to about 15 minutes, such as about 10 minutes. Thereafter, themixture is homogenized with a homogenizer for a time period of about oneminute to about two minutes to produce a combined phase antiperspirantproduct.

The final mixture is poured into molds, and then allowed to cool to roomtemperature. As used herein, the term “allowed to cool” means exposingthe mixture to room temperature for a time sufficient for the mixture tocome to room temperature or exposing the mixture to a refrigerator orcooling room, fan, or other cooling mechanism that lowers thetemperature of the mixture to room temperature. It will be appreciatedthat the sequence of addition and/or combination of the variouscomponents of the antiperspirant product is not necessarily critical,and various sequences for addition or combination of the components canbe used.

EXAMPLES

The following is an exemplary embodiment of an antiperspirantcomposition contemplated herein, with each of the components set forthin weight percent of the antiperspirant product. The example is providedfor illustration purposes only and is not meant to limit the variousembodiments of the antiperspirant product in any way.

EXAMPLE 1 Ingredient Wt. % Water Phase: Aluminum ZirconiumOctachlorohydrex 59.7 Propylene Glycol 8.0 Water 0.4 Oil Phase:Cyclohexasiloxane 7.4 C₁₂-C₁₅ Alkyl Benzoate 10.0 CetylPEG/PPG-10/1-Dimethicone 1.5 Jeenate 3H ™ (Jeen Int'l Corp.) - 485 Avg.MW Polyethylene 11.0 Performa V 343 ™ Polymer (Baker Hughes Inc.) 0.1Additives: Fragrance 1.9 Total 100.0

wherein Jeenate 3H™ is available from Jeen International Corporation ofFairfield, N.J. and wherein Performa V 343™ Polymer is available fromBaker Hughes Incorporated of Sugar Land, Tex.

A 300 gram sample was prepared in accordance with the above Example. Thesample was prepared by adding 179.2 grams of aluminum zirconiumoctachlorohydrex antiperspirant salt to 24.0 grams of propylene glycoland 1.1 grams of water. This mixture, hereinafter referred to as thewater phase, was heated to 70° C. and stirred moderately for a period of10 minutes. In a separate container, 22.2 grams of cyclohexasiloxane, 30grams of C₁₂-C₁₅ alkyl benzoate (provided as Finsolv TN™, available fromInnospec Incorporated of Lone Tree, Colo.), 4.5 grams of cetylPEG/PPG-10/1-dimethicone (provided as Abil EM 90™, available from EvonikIndustries AG of Essen, Germany), 33.0 grams of Jeenate 3H™, and 0.3grams of Performa V 343™ Polymer. This mixture, hereinafter referred toas the oil phase, was heated to 78° C. until all of the polyethylenemelted, stirring moderately. The oil phase mixture was then reduced intemperature to about 75° C. The oil phase mixture was then stirredcontinuously at 75° C. for about 10 minutes, after which time 5.7 gramsof fragrance was added. Thereafter, the water phase mixture and the oilphase mixture were brought together by blade mixing, and thereafterhomogenized to form a combined phase for a time period of about oneminute to about two minutes. The homogenized mixture was then pouredinto a canister and cooled to approximately room temperature.

After the composition was allowed to cool and solidify for severalhours, a stick hardness test was performed. Two measurements were taken,with the first reading of a force of 120.59 g's and the second readingof 113.1 g's. It was further noted that the solidified compositionappeared opaque, and not soft or “mushy.”

Accordingly, various embodiments of an antiperspirant compositionexhibiting desirable glide and residue deposit characteristics have beendisclosed. The antiperspirant compositions are desirably processed andmanufactured at temperatures significantly less than previously known inthe art for antiperspirant compositions including an intermediatemolecular weight structurant, and as such exhibit the benefits of lowermanufacturing costs, reduced manufacturing equipment wear, and reducedoperational complexity. Various embodiments of methods for manufacturingthe same have also been provided.

While at least one exemplary embodiment has been presented in theforegoing detailed description, it should be appreciated that a vastnumber of variations exist. It should also be appreciated that theexemplary embodiment or exemplary embodiments are only examples, and arenot intended to limit the scope, applicability, or configuration of theantiperspirant compounds in any way. Rather, the foregoing detaileddescription will provide those skilled in the art with a convenient roadmap for implementing an exemplary embodiment, it being understood thatvarious changes may be made in the elements described in an exemplaryembodiment without departing from the scope of the invention as setforth in the appended claims and their legal equivalents.

What is claimed is:
 1. An antiperspirant composition comprising: a homogenized water phase and oil phase, wherein the water phase comprises an active antiperspirant compound, an alcohol, and water, and wherein the oil phases comprises a structurant, a W/O emulsifier, and a hydrophobic carrier solvent, wherein the structurant compound comprises a polyethylene having an average molecular weight of about 450 Daltons to about 580 Daltons and a polydispersity index of about 1.05 and wherein the polyethylene has a melting temperature of less than or equal to 78° C.
 2. The antiperspirant composition of claim 1, wherein the active antiperspirant compound comprises aluminum zirconium octachlorohydrex, tetrachlorohydrex, trichlorohydrex, or pentachlorohydrex, or aluminum chlorohydrates, with an optional glycine component.
 3. The antiperspirant composition of claim 1, wherein the active antiperspirant compound is present in the composition in a weight percentage of about 10% to about 20%.
 4. The antiperspirant composition of claim 1, wherein the structurant compound comprises a polyethylene having an average molecular weight of about 485 Daltons and a melting point of about 73° C.
 5. The antiperspirant composition of claim 1, wherein the structurant compound is present in the composition in a weight percentage of about 5% to about 15%.
 6. The antiperspirant composition of claim 1, wherein the antiperspirant composition comprises a homogenized water phase and oil phase, wherein the water phase comprises the active antiperspirant compound, an alcohol, and water, and wherein the oil phases comprises the structurant, a water-in-oil emulsifier, and a hydrophobic carrier solvent.
 7. The antiperspirant composition of claim 1, wherein the antiperspirant composition exhibits a stick hardness of greater than 110 g's.
 8. The antiperspirant composition of claim 1, further comprising an additive compound.
 9. The antiperspirant composition of claim 8, wherein the additive compound is a fragrance. 